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Personal pollen exposure compared to stationary measurements
M Riediker1, S Keller, B Wüthrich
1Institute for Hygiene and Applied Physiology, Environmental Hygiene Section, Swiss Federal Institute of Technology, Zurich.
Journal of Investigational Allergology & Clinical Immunology
|October 20, 2000
Summary
Stationary outdoor pollen monitoring provides a reliable estimate of personal pollen exposure, though actual exposure levels are significantly lower than reported outdoor concentrations. This research highlights the importance of considering personal activity patterns for accurate exposure assessment.
Area of Science:
- Environmental Health
- Occupational Health
- Allergy Research
Background:
- Accurate assessment of personal exposure to airborne allergens like pollen is crucial for understanding and managing allergic diseases.
- Stationary monitoring stations are commonly used for pollen forecasting, but their representativeness for individual exposure is often questioned.
Purpose of the Study:
- To evaluate the correlation between stationary outdoor pollen measurements and personal pollen exposure.
- To determine the extent to which stationary pollen data can predict an individual's actual pollen exposure.
- To investigate the influence of personal activity patterns and time spent outdoors on pollen exposure levels.
Main Methods:
- Ten subjects participated in the study over 36 days during spring and summer.
- Pollen exposure was measured using personal SKC total dust samplers and stationary Burkard pollen traps.
- Personal activity patterns and time spent outdoors were recorded quarter-hourly.
Main Results:
- Stationary comparison of SKC and Burkard samplers showed good correlation (r = 0.981), but SKC samplers collected approximately four times less pollen than Burkard samplers.
- Personal pollen exposure was found to be about 30% of stationary outdoor concentrations, with a significant correlation (r = 0.719).
- The indoor-outdoor pollen ratio was determined to be 0.2, considering the average 14% of sampling time spent outdoors.
Conclusions:
- Stationary outdoor pollen measurements can serve as a reliable indicator for estimating personal pollen exposure over limited periods.
- Personal pollen exposure is substantially lower than what stationary monitoring might suggest.
- Understanding personal activity and time spent outdoors is essential for refining pollen exposure assessments.